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Erroneous intracranial pressure measurements from simultaneous pressure monitoring and ventricular drainage catheters

Erroneous intracranial pressure measurements from simultaneous pressure monitoring and ventricular drainage catheters
Erroneous intracranial pressure measurements from simultaneous pressure monitoring and ventricular drainage catheters

The objective of this report is to highlight the potential for false pressure measurements from systems that combine intracranial pressure (ICP) measurement and ventricular drainage. If the ports of the drain become blocked to the extent that they present a high resistance to cerebrospinal fluid flow, then a significant pressure gradient between the inside and outside of the catheter may be established. Thus, any intracatheter transducer will faithfully record a pressure much lower than true ICP. This holds true for catheter-tip transducers when the transducer lies inside the catheter. In the absence of flow, however, pressures will equalize; therefore, accurate measurements may be taken if the drain is temporarily closed. We model this situation and provide simulations of expected measurements in such situations; these compare well to observed clinical readings.

Adult, Brain Injuries, Catheters, Indwelling, Cerebral Ventricles, Cerebrospinal Fluid, Diagnostic Errors, Equipment Failure, Humans, Intracranial Hypertension, Male, Suction, Case Reports, Journal Article, Research Support, Non-U.S. Gov't
1541-6933
51-54
Birch, A.A.
755f2236-4c0c-49b5-9884-de4021acd42d
Eynon, C.A.
9feb03bc-2559-4c1c-94ea-56a817f7e0c3
Schley, D.
a0e144fa-f7a9-44d7-a99d-e521e70b123a
Birch, A.A.
755f2236-4c0c-49b5-9884-de4021acd42d
Eynon, C.A.
9feb03bc-2559-4c1c-94ea-56a817f7e0c3
Schley, D.
a0e144fa-f7a9-44d7-a99d-e521e70b123a

Birch, A.A., Eynon, C.A. and Schley, D. (2006) Erroneous intracranial pressure measurements from simultaneous pressure monitoring and ventricular drainage catheters. Neurocritical Care, 5 (1), 51-54. (doi:10.1385/NCC:5:1:51).

Record type: Article

Abstract

The objective of this report is to highlight the potential for false pressure measurements from systems that combine intracranial pressure (ICP) measurement and ventricular drainage. If the ports of the drain become blocked to the extent that they present a high resistance to cerebrospinal fluid flow, then a significant pressure gradient between the inside and outside of the catheter may be established. Thus, any intracatheter transducer will faithfully record a pressure much lower than true ICP. This holds true for catheter-tip transducers when the transducer lies inside the catheter. In the absence of flow, however, pressures will equalize; therefore, accurate measurements may be taken if the drain is temporarily closed. We model this situation and provide simulations of expected measurements in such situations; these compare well to observed clinical readings.

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More information

Published date: August 2006
Keywords: Adult, Brain Injuries, Catheters, Indwelling, Cerebral Ventricles, Cerebrospinal Fluid, Diagnostic Errors, Equipment Failure, Humans, Intracranial Hypertension, Male, Suction, Case Reports, Journal Article, Research Support, Non-U.S. Gov't

Identifiers

Local EPrints ID: 427484
URI: https://eprints.soton.ac.uk/id/eprint/427484
ISSN: 1541-6933
PURE UUID: 1f2fc7d8-3b79-4414-bedc-a8d2003f94bb
ORCID for A.A. Birch: ORCID iD orcid.org/0000-0002-2328-702X

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Date deposited: 21 Jan 2019 17:30
Last modified: 14 Mar 2019 01:22

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Contributors

Author: A.A. Birch ORCID iD
Author: C.A. Eynon
Author: D. Schley

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